+ 3t+5. The total sales of a company (in millions of dollars) t months from now are given by S(t) = 0.02t +0.31 + (A) Find S'(t). (B) Find S(7) and S'(7) (to two decimal places). (C) Interpret S(13) = 138.64 and S'(13) = 20.94. (A) S'(t) = (B) S(7) = S'(7)= (C) Choose the correct interpretation of S(13) = 138.64. OA. The total sales 13 months from now will be $138.64 million dollars. OB. In approximately 139 months the sales will be increasing by $13 million per month. OC. In approximately 139 months the sales will be $13 million dollars. OD. In 13 months the sales will be increasing at a rate of $138.64 million per month. Choose the correct interpretation of S'(13) = 20.94. OA. The total sales 13 months from now will be $20.94 million dollars. B. In approximately 21 months the sales will be increasing by $13 million per month. OC. In 13 months the sales will be increasing at a rate of $20.94 million per month. OD. In approximately 21 months the sales will be $13 million dollars.